package cn.pengge.springaop.reflection;


import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

//分析性能问题
public class Test10 {

    //普通方式调用
    public static void test01() {


        User user = new User();

        long startTime = System.currentTimeMillis();


        for (int i = 0; i < 1000000000; i++) {

            user.getName();
        }

        long endTime = System.currentTimeMillis();
        System.out.println("普通方式执行10亿次" + (endTime - startTime) + "ms");


    }

    //反射方式调用
    public static void test02() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {


        User user = new User();
        Class c1 =user.getClass();

        Method getName = c1.getDeclaredMethod("getName", null);


        long startTime = System.currentTimeMillis();

        for (int i = 0; i < 1000000000; i++) {


            getName.invoke(user,null);

        }

        long endTime = System.currentTimeMillis();
        System.out.println("反射方式执行10亿次" + (endTime - startTime) + "ms");


    }

    //反射方式调用 关闭检测
    public static void test03() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {


        User user = new User();
        Class c1 =user.getClass();

        Method getName = c1.getDeclaredMethod("getName", null);
        getName.setAccessible(true);

        long startTime = System.currentTimeMillis();

        for (int i = 0; i < 1000000000; i++) {

            getName.invoke(user,null);

        }

        long endTime = System.currentTimeMillis();
        System.out.println("关闭检测方式执行10亿次" + (endTime - startTime) + "ms");


    }

    public static void main(String[] args) throws InvocationTargetException, NoSuchMethodException, IllegalAccessException {

        test01();
        test02();
        test03();
    }

}
